186 lines
4.8 KiB
C
186 lines
4.8 KiB
C
/*
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Copyright (C) 2009 Grame
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <errno.h>
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#ifndef WIN32
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#include <unistd.h>
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#endif
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#include <math.h>
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#include <signal.h>
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#include <getopt.h>
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#include <string.h>
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#include <assert.h>
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#include <jack/net.h>
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jack_net_master_t* net;
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#define BUFFER_SIZE 512
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#define SAMPLE_RATE 44100
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static void signal_handler(int sig)
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{
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jack_net_master_close(net);
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fprintf(stderr, "signal received, exiting ...\n");
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exit(0);
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}
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static void
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usage ()
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{
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fprintf (stderr, "\n"
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"usage: jack_net_master \n"
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" [ -b buffer size (default = %d) ]\n"
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" [ -r sample rate (default = %d) ]\n"
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" [ -a hostname (default = %s) ]\n"
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" [ -p port (default = %d) ]\n", BUFFER_SIZE, SAMPLE_RATE, DEFAULT_MULTICAST_IP, DEFAULT_PORT);
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}
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int
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main (int argc, char *argv[])
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{
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int buffer_size = BUFFER_SIZE;
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int sample_rate = SAMPLE_RATE;
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int udp_port = DEFAULT_PORT;
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const char* multicast_ip = DEFAULT_MULTICAST_IP;
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const char *options = "b:r:a:p:h";
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int option_index;
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int opt;
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struct option long_options[] =
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{
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{"buffer size", 1, 0, 'b'},
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{"sample rate", 1, 0, 'r'},
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{"hostname", 1, 0, 'a'},
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{"port", 1, 0, 'p'},
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{0, 0, 0, 0}
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};
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while ((opt = getopt_long (argc, argv, options, long_options, &option_index)) != -1) {
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switch (opt) {
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case 'b':
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buffer_size = atoi(optarg);
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break;
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case 'r':
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sample_rate = atoi(optarg);
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break;
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case 'a':
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multicast_ip = strdup(optarg);
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break;
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case 'p':
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udp_port = atoi(optarg);
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break;
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case 'h':
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usage();
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return -1;
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}
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}
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int i;
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jack_master_t request = { 4, 4, -1, -1, buffer_size, sample_rate, "master" };
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//jack_master_t request = { -1, -1, -1, -1, buffer_size, sample_rate, "master" };
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jack_slave_t result;
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float** audio_input_buffer;
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float** audio_output_buffer;
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int wait_usec = (int) ((((float)buffer_size) * 1000000) / ((float)sample_rate));
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printf("Waiting for a slave...\n");
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if ((net = jack_net_master_open(multicast_ip, udp_port, "net_master", &request, &result)) == 0) {
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fprintf(stderr, "NetJack master can not be opened\n");
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return 1;
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}
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printf("Slave is running...\n");
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/* install a signal handler to properly quits jack client */
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#ifdef WIN32
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signal(SIGINT, signal_handler);
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signal(SIGABRT, signal_handler);
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signal(SIGTERM, signal_handler);
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#else
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signal(SIGQUIT, signal_handler);
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signal(SIGTERM, signal_handler);
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signal(SIGHUP, signal_handler);
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signal(SIGINT, signal_handler);
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#endif
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// Allocate buffers
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audio_input_buffer = (float**)calloc(result.audio_input, sizeof(float*));
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for (i = 0; i < result.audio_input; i++) {
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audio_input_buffer[i] = (float*)calloc(buffer_size, sizeof(float));
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}
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audio_output_buffer = (float**)calloc(result.audio_output, sizeof(float*));
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for (i = 0; i < result.audio_output; i++) {
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audio_output_buffer[i] = (float*)calloc(buffer_size, sizeof(float));
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}
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/*
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Run until interrupted.
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WARNING !! : this code is given for demonstration purpose. For proper timing bevahiour
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it has to be called in a real-time context (which is *not* the case here...)
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*/
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while (1) {
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// Copy input to output
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assert(result.audio_input == result.audio_output);
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for (i = 0; i < result.audio_input; i++) {
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memcpy(audio_output_buffer[i], audio_input_buffer[i], buffer_size * sizeof(float));
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}
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if (jack_net_master_send(net, result.audio_output, audio_output_buffer, 0, NULL) < 0) {
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printf("jack_net_master_send failure, exiting\n");
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break;
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}
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if (jack_net_master_recv(net, result.audio_input, audio_input_buffer, 0, NULL) < 0) {
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printf("jack_net_master_recv failure, exiting\n");
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break;
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}
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usleep(wait_usec);
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};
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// Wait for application end
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jack_net_master_close(net);
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for (i = 0; i < result.audio_input; i++) {
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free(audio_input_buffer[i]);
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}
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free(audio_input_buffer);
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for (i = 0; i < result.audio_output; i++) {
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free(audio_output_buffer[i]);
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}
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free(audio_output_buffer);
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exit (0);
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}
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